Cleartext storage of sensitive information in the @step and @remote decorator pipeline component in Amazon SageMaker Python SDK before v3.11.0 and v2.256.0 might allow an authenticated remote user to extract the HMAC signing key from SageMaker DescribePipeline API responses and forge valid integrity signatures for specially crafted function payloads, achieving code execution in another user's pipeline execution context within the same AWS account.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://aws.amazon.com/security/security-bulletins/2026-093-aws/
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https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.256.0
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https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.11.0
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https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7xmc-crrw-…
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